C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

K. N. Cassemiro, K. Laiho, and C. Silberhorn, “Accessing the purity of a single photon by the width of the Hong-Ou-Mandel interference,” New J. Phys.12, 113052 (2010).

[CrossRef]

X.-Q. Shao, L. Chen, S. Zhang, and Y.-F. Zhao, “Swap gate and controlled swap gate based on a single resonant interaction with cavity quantum electrodynamics,” Physica Scripta79, 065004 (2009).

[CrossRef]

Y.-X. Gong, G.-C. Guo, and T. C. Ralph, “Methods for a linear optical quantum Fredkin gate,” Phys. Rev. A78, 012305 (2008).

[CrossRef]

J. Fiurášek, “Linear optical fredkin gate based on partial-SWAP gate,” Phys. Rev. A78, 032317 (2008).

[CrossRef]

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science320, 646–649 (2008).

[CrossRef]
[PubMed]

B. Wang and L.-M. Duan, “Implementation scheme of controlled SWAP gates for quantum fingerprinting and photonic quantum computation,” Phys. Rev. A75, 050304 (2007).

[CrossRef]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

F. Xue, J.-F. Du, X.-Y. Zhou, R.-D. Han, and J.-H. Wu, “Experimentally obtaining the likeness of two unknown qubits on a nuclear-magnetic-resonance quantum information processor,” Chinese Phys. Lett.20, 1669–1671 (2003).

[CrossRef]

M. Hendrych, M. Dušek, R. Filip, and J. Fiurášek, “Simple optical measurement of the overlap and fidelity of quantum states,” Phys. Lett. A310, 95–100 (2003).

[CrossRef]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

R. Filip, “Overlap and entanglement-witness measurements,” Phys. Rev. A65, 062320 (2002).

[CrossRef]

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412, 313–316 (2001).

[CrossRef]
[PubMed]

Z. Y. Ou, J.-K. Rhee, and L. J. Wang, “Photon bunching and multiphoton interference in parametric down-conversion,” Phys. Rev. A60, 593–604 (1999).

[CrossRef]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense coding in experimental quantum communication,” Phys. Rev. Lett.76, 4656–4659 (1996).

[CrossRef]
[PubMed]

J. G. Rarity and P. R. Tapster, “Experimental violation of Bell’s inequality based on phase and momentum,” Phys. Rev. Lett.64, 2495–2498 (1990).

[CrossRef]
[PubMed]

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett.59, 2044–2046 (1987).

[CrossRef]
[PubMed]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

K. N. Cassemiro, K. Laiho, and C. Silberhorn, “Accessing the purity of a single photon by the width of the Hong-Ou-Mandel interference,” New J. Phys.12, 113052 (2010).

[CrossRef]

P. Rungta, W. Munro, K. Nemoto, P. Deuar, G. J. Milburn, and C. M. Caves, Qudit Entanglement (Springer Berlin Heidelberg, 2001).

X.-Q. Shao, L. Chen, S. Zhang, and Y.-F. Zhao, “Swap gate and controlled swap gate based on a single resonant interaction with cavity quantum electrodynamics,” Physica Scripta79, 065004 (2009).

[CrossRef]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science320, 646–649 (2008).

[CrossRef]
[PubMed]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

P. Rungta, W. Munro, K. Nemoto, P. Deuar, G. J. Milburn, and C. M. Caves, Qudit Entanglement (Springer Berlin Heidelberg, 2001).

F. Xue, J.-F. Du, X.-Y. Zhou, R.-D. Han, and J.-H. Wu, “Experimentally obtaining the likeness of two unknown qubits on a nuclear-magnetic-resonance quantum information processor,” Chinese Phys. Lett.20, 1669–1671 (2003).

[CrossRef]

B. Wang and L.-M. Duan, “Implementation scheme of controlled SWAP gates for quantum fingerprinting and photonic quantum computation,” Phys. Rev. A75, 050304 (2007).

[CrossRef]

M. Hendrych, M. Dušek, R. Filip, and J. Fiurášek, “Simple optical measurement of the overlap and fidelity of quantum states,” Phys. Lett. A310, 95–100 (2003).

[CrossRef]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

M. Hendrych, M. Dušek, R. Filip, and J. Fiurášek, “Simple optical measurement of the overlap and fidelity of quantum states,” Phys. Lett. A310, 95–100 (2003).

[CrossRef]

R. Filip, “Overlap and entanglement-witness measurements,” Phys. Rev. A65, 062320 (2002).

[CrossRef]

J. Fiurášek, “Linear optical fredkin gate based on partial-SWAP gate,” Phys. Rev. A78, 032317 (2008).

[CrossRef]

M. Hendrych, M. Dušek, R. Filip, and J. Fiurášek, “Simple optical measurement of the overlap and fidelity of quantum states,” Phys. Lett. A310, 95–100 (2003).

[CrossRef]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

Y.-X. Gong, G.-C. Guo, and T. C. Ralph, “Methods for a linear optical quantum Fredkin gate,” Phys. Rev. A78, 012305 (2008).

[CrossRef]

Y.-X. Gong, G.-C. Guo, and T. C. Ralph, “Methods for a linear optical quantum Fredkin gate,” Phys. Rev. A78, 012305 (2008).

[CrossRef]

F. Xue, J.-F. Du, X.-Y. Zhou, R.-D. Han, and J.-H. Wu, “Experimentally obtaining the likeness of two unknown qubits on a nuclear-magnetic-resonance quantum information processor,” Chinese Phys. Lett.20, 1669–1671 (2003).

[CrossRef]

M. Hendrych, M. Dušek, R. Filip, and J. Fiurášek, “Simple optical measurement of the overlap and fidelity of quantum states,” Phys. Lett. A310, 95–100 (2003).

[CrossRef]

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett.59, 2044–2046 (1987).

[CrossRef]
[PubMed]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense coding in experimental quantum communication,” Phys. Rev. Lett.76, 4656–4659 (1996).

[CrossRef]
[PubMed]

K. N. Cassemiro, K. Laiho, and C. Silberhorn, “Accessing the purity of a single photon by the width of the Hong-Ou-Mandel interference,” New J. Phys.12, 113052 (2010).

[CrossRef]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412, 313–316 (2001).

[CrossRef]
[PubMed]

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett.59, 2044–2046 (1987).

[CrossRef]
[PubMed]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense coding in experimental quantum communication,” Phys. Rev. Lett.76, 4656–4659 (1996).

[CrossRef]
[PubMed]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

P. Rungta, W. Munro, K. Nemoto, P. Deuar, G. J. Milburn, and C. M. Caves, Qudit Entanglement (Springer Berlin Heidelberg, 2001).

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

P. Rungta, W. Munro, K. Nemoto, P. Deuar, G. J. Milburn, and C. M. Caves, Qudit Entanglement (Springer Berlin Heidelberg, 2001).

P. Rungta, W. Munro, K. Nemoto, P. Deuar, G. J. Milburn, and C. M. Caves, Qudit Entanglement (Springer Berlin Heidelberg, 2001).

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science320, 646–649 (2008).

[CrossRef]
[PubMed]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

Z. Y. Ou, J.-K. Rhee, and L. J. Wang, “Photon bunching and multiphoton interference in parametric down-conversion,” Phys. Rev. A60, 593–604 (1999).

[CrossRef]

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett.59, 2044–2046 (1987).

[CrossRef]
[PubMed]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science320, 646–649 (2008).

[CrossRef]
[PubMed]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

Y.-X. Gong, G.-C. Guo, and T. C. Ralph, “Methods for a linear optical quantum Fredkin gate,” Phys. Rev. A78, 012305 (2008).

[CrossRef]

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science320, 646–649 (2008).

[CrossRef]
[PubMed]

J. G. Rarity and P. R. Tapster, “Experimental violation of Bell’s inequality based on phase and momentum,” Phys. Rev. Lett.64, 2495–2498 (1990).

[CrossRef]
[PubMed]

Z. Y. Ou, J.-K. Rhee, and L. J. Wang, “Photon bunching and multiphoton interference in parametric down-conversion,” Phys. Rev. A60, 593–604 (1999).

[CrossRef]

P. Rungta, W. Munro, K. Nemoto, P. Deuar, G. J. Milburn, and C. M. Caves, Qudit Entanglement (Springer Berlin Heidelberg, 2001).

C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

X.-Q. Shao, L. Chen, S. Zhang, and Y.-F. Zhao, “Swap gate and controlled swap gate based on a single resonant interaction with cavity quantum electrodynamics,” Physica Scripta79, 065004 (2009).

[CrossRef]

K. N. Cassemiro, K. Laiho, and C. Silberhorn, “Accessing the purity of a single photon by the width of the Hong-Ou-Mandel interference,” New J. Phys.12, 113052 (2010).

[CrossRef]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

J. G. Rarity and P. R. Tapster, “Experimental violation of Bell’s inequality based on phase and momentum,” Phys. Rev. Lett.64, 2495–2498 (1990).

[CrossRef]
[PubMed]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412, 313–316 (2001).

[CrossRef]
[PubMed]

C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

B. Wang and L.-M. Duan, “Implementation scheme of controlled SWAP gates for quantum fingerprinting and photonic quantum computation,” Phys. Rev. A75, 050304 (2007).

[CrossRef]

Z. Y. Ou, J.-K. Rhee, and L. J. Wang, “Photon bunching and multiphoton interference in parametric down-conversion,” Phys. Rev. A60, 593–604 (1999).

[CrossRef]

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412, 313–316 (2001).

[CrossRef]
[PubMed]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense coding in experimental quantum communication,” Phys. Rev. Lett.76, 4656–4659 (1996).

[CrossRef]
[PubMed]

F. Xue, J.-F. Du, X.-Y. Zhou, R.-D. Han, and J.-H. Wu, “Experimentally obtaining the likeness of two unknown qubits on a nuclear-magnetic-resonance quantum information processor,” Chinese Phys. Lett.20, 1669–1671 (2003).

[CrossRef]

F. Xue, J.-F. Du, X.-Y. Zhou, R.-D. Han, and J.-H. Wu, “Experimentally obtaining the likeness of two unknown qubits on a nuclear-magnetic-resonance quantum information processor,” Chinese Phys. Lett.20, 1669–1671 (2003).

[CrossRef]

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science320, 646–649 (2008).

[CrossRef]
[PubMed]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412, 313–316 (2001).

[CrossRef]
[PubMed]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense coding in experimental quantum communication,” Phys. Rev. Lett.76, 4656–4659 (1996).

[CrossRef]
[PubMed]

X.-Q. Shao, L. Chen, S. Zhang, and Y.-F. Zhao, “Swap gate and controlled swap gate based on a single resonant interaction with cavity quantum electrodynamics,” Physica Scripta79, 065004 (2009).

[CrossRef]

X.-Q. Shao, L. Chen, S. Zhang, and Y.-F. Zhao, “Swap gate and controlled swap gate based on a single resonant interaction with cavity quantum electrodynamics,” Physica Scripta79, 065004 (2009).

[CrossRef]

F. Xue, J.-F. Du, X.-Y. Zhou, R.-D. Han, and J.-H. Wu, “Experimentally obtaining the likeness of two unknown qubits on a nuclear-magnetic-resonance quantum information processor,” Chinese Phys. Lett.20, 1669–1671 (2003).

[CrossRef]

F. Xue, J.-F. Du, X.-Y. Zhou, R.-D. Han, and J.-H. Wu, “Experimentally obtaining the likeness of two unknown qubits on a nuclear-magnetic-resonance quantum information processor,” Chinese Phys. Lett.20, 1669–1671 (2003).

[CrossRef]

A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglement of the orbital angular momentum states of photons,” Nature412, 313–316 (2001).

[CrossRef]
[PubMed]

C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato, and L. Marrucci, “Joining the quantum state of two photons into one,” Nature Photon.7, 521–526 (2013).

[CrossRef]

K. N. Cassemiro, K. Laiho, and C. Silberhorn, “Accessing the purity of a single photon by the width of the Hong-Ou-Mandel interference,” New J. Phys.12, 113052 (2010).

[CrossRef]

S. M. Lee, H. S. Park, J. Cho, Y. Kang, J. Y. Lee, H. Kim, D.-H. Lee, and S.-K. Choi, “Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation,” Opt. Express20, 6915–6926 (2012).

[CrossRef]
[PubMed]

M. Hendrych, M. Dušek, R. Filip, and J. Fiurášek, “Simple optical measurement of the overlap and fidelity of quantum states,” Phys. Lett. A310, 95–100 (2003).

[CrossRef]

Z. Y. Ou, J.-K. Rhee, and L. J. Wang, “Photon bunching and multiphoton interference in parametric down-conversion,” Phys. Rev. A60, 593–604 (1999).

[CrossRef]

B. Wang and L.-M. Duan, “Implementation scheme of controlled SWAP gates for quantum fingerprinting and photonic quantum computation,” Phys. Rev. A75, 050304 (2007).

[CrossRef]

R. Filip, “Overlap and entanglement-witness measurements,” Phys. Rev. A65, 062320 (2002).

[CrossRef]

Y.-X. Gong, G.-C. Guo, and T. C. Ralph, “Methods for a linear optical quantum Fredkin gate,” Phys. Rev. A78, 012305 (2008).

[CrossRef]

J. Fiurášek, “Linear optical fredkin gate based on partial-SWAP gate,” Phys. Rev. A78, 032317 (2008).

[CrossRef]

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett.59, 2044–2046 (1987).

[CrossRef]
[PubMed]

S. V. Polyakov, A. Muller, E. B. Flagg, A. Ling, N. Borjemscaia, E. Van Keuren, A. Migdall, and G. S. Solomon, “Coalescence of single photons emitted by disparate single-photon sources: The example of InAs quantum dots and parametric down-conversion sources,” Phys. Rev. Lett.107, 157402 (2011).

[CrossRef]
[PubMed]

A. K. Ekert, C. M. Alves, D. K. L. Oi, M. Horodecki, P. Horodecki, and L. C. Kwek, “Direct estimations of linear and nonlinear functionals of a quantum state,” Phys. Rev. Lett.88, 217901 (2002).

[CrossRef]
[PubMed]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense coding in experimental quantum communication,” Phys. Rev. Lett.76, 4656–4659 (1996).

[CrossRef]
[PubMed]

J. G. Rarity and P. R. Tapster, “Experimental violation of Bell’s inequality based on phase and momentum,” Phys. Rev. Lett.64, 2495–2498 (1990).

[CrossRef]
[PubMed]

I. Marcikic, H. de Riedmatten, W. Tittel, H. Zbinden, M. Legré, and N. Gisin, “Distribution of time-bin entangled qubits over 50 km of optical fiber,” Phys. Rev. Lett.93, 180502 (2004).

[CrossRef]
[PubMed]

X.-Q. Shao, L. Chen, S. Zhang, and Y.-F. Zhao, “Swap gate and controlled swap gate based on a single resonant interaction with cavity quantum electrodynamics,” Physica Scripta79, 065004 (2009).

[CrossRef]

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science320, 646–649 (2008).

[CrossRef]
[PubMed]

P. Rungta, W. Munro, K. Nemoto, P. Deuar, G. J. Milburn, and C. M. Caves, Qudit Entanglement (Springer Berlin Heidelberg, 2001).